Screw-on stopper cap, having a tamper-proof band

Abstract

A screw-on stopper cap, having a tamper-proof band, for a bottle with a counter-ring, of the type including a skirt, and of an annular anti-tamper collar connected to the skirt by breakable bridges and having on its bottom a plurality of articulated tabs which are folded back against the inside face of the collar, wherein the tabs are of constant section and include two parts, namely a first curved part, connected to the bottom of the collar and continued by a second rectilinear part, the joining portion between these two parts being intended to bear against the counter-ring, while the free rectilinear portion is intended to bear against the inside face of the collar.

I claim: 
     
       1. A screw-on stopper cap for a bottle with a neck which has threads and a counter-ring arranged beneath the threads, the cap comprising: a top portion;   an annular side skirt formed integrally with said top portion and having internal threads which communicate with the threads of the neck;   an annular anti-tamper collar disposed beneath a bottom surface of said skirt and including a downwardly extending section and a plurality of inwardly facing articulated tabs of constant cross section which are integrally connected to a bottom of said section, said tabs comprising a first curved part connected to the bottom of said section and a second rectilinear part which is joined to said first part by a joining portion and contiguous with an inner surface of said section; and   a plurality of breakable bridges connected at one end to the bottom surface of said skirt and at another end to a top portion of said section;   wherein when the cap is unscrewed from the bottle the joining portion between said first part and said second part abuts against the counter-ring of the neck, thereby applying a force to the inner surface of said section which breaks said bridges.   
     
     
       2. The screw-on stopper cap of claim 1, wherein a top portion of said inner surface of said section comprises a shoulder which restricts upward movement of said second part.